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| 1 | Enhanced Strength and Ductility Due to Microstructure Refinement and Texture Weakening of the GW102K Alloy by Cyclic Extrusion Compression显示文摘The cyclic extrusion compression(CEC) was applied to severely deform the as-extruded GW102K(Mg–10.0Gd–2.0Y–0.5Zr, wt%) alloy at 350, 400, and 450 °C, respectively. The microstructure, texture, and grain boundary character distribution of the CECed alloy were investigated in the present work. The mechanical properties were measured by uniaxial tension at room temperature. The crack initiation on the longitudinal section near the tensile fracture-surface was investigated by high-resolution scanning electron microscopy(SEM). The result shows that the microstructure was dramatically refined by dynamic recrystallization(DRX). The initial fiber texture was disintegrated and obviously weakened. The 8-passes/350 °C CECed alloy exhibited yield strength of 318 MPa with an elongation-to-fracture of 16.8%, increased by 41.3% and 162.5%, respectively. Moreover, the elongation-to-fracture of the 8-passes/450 °C CECed alloy significantly increased more than 3 times than that of the received alloy. The cracks were mainly initiated at twin boundaries and second phase/matrix interfaces during tensile deformation. The microstructure refinement was considered to result in the dramatically enhanced of the strength and ductility. In addition, the texture randomization during CEC is beneficial for enhancing ductility. The standard positive Hall–Petch relationships have been obtained for the CECed GW102 K alloy. | Jinbao Lin Xinyi Wang Weijie Ren Xuexia Yang Qudong Wang | 2016 | Journal of Materials Science & Technology2016，32，8： | 9 |
| 2 | Epitaxial growth of large-area and highly crystalline anisotropic ReSe2 atomic layer显示文摘各向异性二维(2D ) 分层的材料金来二硫化物(因为它的不平常的性质和有希望的应用, ReSe 2) 吸引了可观的注意在电子并且 optoelectronic 设备。因为它的低格子对称和夹层去耦,各向异性的生长和 out-of-plane 生长不管多么容易发生,产出厚薄片,树枝状的结构,或象花的结构。在这研究,我们表明了一个自底向上的方法为控制并且由货车 der Waals 取向附生的 ReSe 2 的可伸缩的合成。完成可控制的生长,一与一个限制反应空格微反应堆被在化学蒸汽免职系统叠二云母底层构造。在限制反应空间以内, ReSe 2 的成核密度和生长率显著地被减少,赞成有一致单层厚度的 ReSe 2 的大区域的合成。有生长温度的 ReSe 2 的词法进化显示各向异性的生长在低生长温度被压制(< 600 吗? | Fangfang Cui Xiaobo Li Qingliang Feng Jianbo Yin Lin Zhou Dongyan Liu Kaiqiang Liu Xuexia He Xing Liang Shengzhong Liu Zhibin Lei Zonghuai Liu Hailin Peng Jin Zhang Jing Kong Hua Xu | 2017 | Nano Research2017，10，8： | 6 |
| 3 | Ultra-sensitive flexible Ga_(2)O_(3)solar-blind photodetector array realized via ultra-thin absorbing medium显示文摘The quest for solar-blind photodetectors with outstanding optoelectronic properties and weak signals detection capability is essential for their applications in the field of imaging,communication,warning,etc.To date,Ga_(2)O_(3)has demonstrated potential for high-performance solar-blind photodetectors.However,the performance usually decays superlinearly at low light intensities due to carrier-trapping effect,which limits the weak signal detection capability of Ga_(2)O_(3)photodetectors.Herein,a Ga_(2)O_(3)solarblind photodetector with ultra-thin absorbing medium has been designed to restrain trapping of photo-generated carriers during the transporting process by shortening the carrier transport distance.Meanwhile,multiple-beam interference is employed to enhance the absorption efficiency of the Ga_(2)O_(3)layer using an Al/Al_(2)O_(3)/Ga_(2)O_(3)structure.Based on the ultra-thin absorbing medium with enhanced absorption efficiency,a 7×7 flexible photodetector array is developed,and the detectivity can reach 1.7×10^(15)Jones,which is among the best values ever reported for Ga_(2)O_(3)photodetectors.Notably,the performance of the photodetector decays little as the illumination intensity is as weak as 5 nW/cm2,revealing the capacity to detect ultra-weak signals.In addition,the flexible photodetector array can execute the functions of imaging,spatial distribution of light source intensity,real-time light trajectory detection,etc.Our results may provide a route to high-performance solar-blind photodetectors for ultra-weak light detection. | Yancheng Chen Xun Yang Yuan Zhang Xuexia Chen Junlu Sun Zhiyang Xu Kaiyong Li Lin Dong Chongxin Shan | 2022 | Nano Research2022，15，4： | 1 |
| 4 | Fabry-Perot interference and piezo-phototronic effect enhanced flexible MoS_(2) photodetector显示文摘Flexible photodetectors(PDs)are indispensable components for next-generation wearable electronics.Recently,two-dimensional(2D)materials have been implemented as functional flexible optoelectronic devices due to their characteristics of atomically thin layers,excellent flexibility,and strain sensitivity.In this work,we developed a flexible photodetector based on MoS_(2)/NiO heterojunction,and Fabry-Perot(F-P)and piezo-phototronic effect have been employed to enhance the responsivity(R)and external quantum efficiency(EQE)of the devices.The F-P effect is utilized to improve the optical absorption of the MoS_(2),resulting in an enhancement in the photoluminescence(PL)of monolayer MoS_(2) and the EQE of the photodetector by 30 and 130 times,respectively.The flexible photodetector exhibits an ultrahigh detectivity(D*)of 2.6×10^(14) Jones,which is the highest value ever reported for flexible MoS_(2) PDs.The piezo-potential of monolayer MoS_(2) decreases the valence band offset at the interface of MoS_(2)/NiO,which increases the transfer efficiency of the photon-generated carriers significantly.Under 1.17%tensile strain,the R of the flexible photodetector can be enhanced by 271%.This research may provide a universal strategy for the design and performance optimization of 2D materials heterostructures for flexible optoelectronics. | Xuexia Chen Xun Yang Qing Lou Yuan Zhang Yancheng Chen Yacong Lu Lin Dong Chong-Xin Shan | 2022 | Nano Research2022，15，5： | 1 |
| 5 | Biotransformation of wheat straw to bacterial cellulose and its mechanism显示文摘 | CHEN Lin HONG Feng YANG Xuexia | 2013 | Bioresource Technology2013，135，： | 1 |
| 6 | Ultrasensitive broadband position-sensitive detector based on graphitic carbon nitride显示文摘As a typical two-dimensional material,graphitic carbon nitride(g-CN)has attracted great interest because of its distinctive electronic,optical,and catalytic properties.However,the absence of a feasible route toward large-area and high-quality films hinders its development in optoelectronics.Herein,high-quality g-CN films have been grown on Si substrate via a vapor-phase transport-assisted condensation method.The g-CN/Si heterojunction shows an obvious response to ultraviolet–visible-near infrared photons with a responsivity of 133 A·W−1,which is two orders of magnitude higher than the best value ever reported for g-CN photodetectors.A position-sensitive detector(PSD)has been developed using the lateral photovoltaic effect of the g-CN/Si heterojunction.The PSD shows a wide response spectrum ranging from 300 to 1,100 nm,and a position sensitivity and rise/decay time of 395 mV·mm−1 and 3.1/50μs,respectively.Moreover,the application of the g-CN/Si heterojunction photodetector in trajectory tracking and acoustic detection has been realized for the first time.This work unveils the potential of g-CN for large-area photodetectors,and prospects for their applications in trajectory tracking and acoustic detection. | Xuexia Chen Xun Yang Qing Lou Yongzhi Tian Zhiyu Liu Chaofan Lv Yancheng Chen Lin Dong Chong-Xin Shan | 2023 | Nano Research2023，16，1： | 0 |
| 7 | Determination of polybrominated diphenyl ethers in river water by combination of liquid–liquid extraction and gas chromatography–mass spectrometry显示文摘In this work,a reliable and sensitive method for detecting polybrominated diphenyl ethers(PBDEs) has been developed by the combination of liquid–liquid extraction and gas chromatography–mass spectrometry.PBDEs were extracted from a large volume of water by liquid–liquid extraction and purified by silica gel chromatography.In order to reduce the deviation,dibromobiphenyl was exploited as the internal standard to minimize differences among the injections.The quantification was performed using an external standard.Good linear correlation coefficients(>0.991) and a wide linearity range(1.0–500.0 ng/L) indicated the steadiness of the proposed method.Moreover,the satisfactory recovery(>75%)suggested that successful determination of PBDEs in river water had been achieved.Furthermore,the deduction behavior of PBDEs in river water could be inferred according to the results. | Weifei Zhang Xuexia Lin Hai-Fang Li Zhihua Wang Jin-Ming Lin | 2014 | Chinese Chemical Letters2014，25，9： | 0 |
| 8 | Comprehensive Research on Focal Mechanism Solutions in the Capital Circle Area of China显示文摘Comprehensive statistical analysis was performed on the basic features of focal mechanisms of 619 ML≥2. 0 earthquakes which occurred in the capital circle area from January 2002 to June 2010. By dividing the capital area into three studying regions based on regional tectonic characteristics,cluster analysis was conducted on the focal mechanisms of all subregions using the longest distance method in the statistical cluster analysis to study the characteristics of tectonic stress tensors. The result shows that dominant P-axis azimuth distribution is NNE-NEE and that of T-axis is NNW-NWW,most of the focal areas are controlled by a horizontal stress field and rupture is mainly of horizontal strike-slip. The maximum principal compression stress orientation is NE75° in the west,NE62° in the middle,and near EW in the east of the capital area. The regional tectonic stress field is characterized by horizontal compression. | Wu Minjie Wu Anxu Xu Ping Lin Xiangdong Dong Hongyan Xin Xuexia Li Layue | 2014 | Earthquake Research in China2014，28，1： | 0 |
| 9 | Microfluidic chip of concentration gradient and fluid shear stress on a single cell level显示文摘Concentration gradient and fluid shear stress(FSS)for cell microenvironment were investigated through microfluidic technology.The Darcy–Weisbach equation combined with computational fluid dynamics modeling was exploited to design the microfluidic chip,and the FSS distribution on the cell model with varying micro-channels(triangular,conical,and elliptical).The diffusion with the incompressible laminar flow model by solving the time-dependent diffusion–convection equation was applied to simulate the gradient profiles of concentration in the micro-channels.For the study of single cell in-depth,the FSS was investigated by the usage of polystyrene particles and the concentration diffusion distribution was studied by the usage of different colors of dyes.A successful agreement between model simulations and experimental data was obtained.Finally,based on the established method,the communication between individual cells was envisaged and modeled.The developed method provides valuable insights and allows to continuously improve the design of microfluidic devices for the study of single cell,the occurrence and development of tumors,and therapeutic applications. | Xuexia Lin Jianlong Su Shufeng Zhou | 2022 | Chinese Chemical Letters2022，33，6： | 0 |
| 10 | Cytogenetic analysis and family research for two cases of chromosome 6 microduplication and chromosome 9 microdeletion:Different clinical manifestations显示文摘Dear editor:Chromosomal abnormalities are the result of alteration in the number or structure of chromosomes causing diverse functional problems to various organs.1 Recently,though strategies for prenatal diagnosis for chromosomal abnormalities have progressed rapidly,management of patients of chromosomal abnormalities still remains an important medical problem.2 In medical genetics,cytogenetic analysis is becoming an essential source of diagnostic information and provides a genome-wide snapshot of an individual's chromosomes. | Lin Zhang Mei Hong Ren Guining Song Xuexia Liu Yanhui Li Chengling Zhang Xiaohong Zhang | 2023 | Gynecology and Obstetrics Clinical Medicine2023，3，1： | 0 |
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